The series "Category medium temperature special patent series self-limit temperature band" for a combination of special series and patented series of, that is, using the special medium temperature PTC material, manufactured in accordance with the structure of the patented product, its performance is better, reached world leading level, the product mainly used in high ambient temperature, the required steam cleaning pipeline, inflammable, explosive, high protection class, restrictions were more stringent, installed in the permanent and not easy disassembly and maintenance-free, or buried underground process pipelines. built-in or posted outside the antifreeze containers, tanks, instruments and equipment, insulation, heat tracing, heating and other occasions as well as an extension of the development of a variety of electric equipment. Such as total control of power plant instrumentation pipeline need a steam sweeping lines, offshore oil platforms heat input antifreeze Station West-East Gas pipeline explosion-proof, anti-condensation, frost blocking and able to meet such a variety of special high demands and takes 60 - with 90 times the thermal energy they need to cross, overlap, long life and a variety of special requirements, such as heating occasions. 
 Technical characteristics: 
 The maximum gap temperature: 215 ° C (≤ 1h) 
 Insulation isolate the maximum gap of temperature: ≤ 300 ° C (≤ 1h) 
 Minimum installation temperature: -40 ℃ 
 220V when the length of the maximum use of one-way power: 100 ~ 200m 
 Structure and material of Interpretation: 
 (1) dozens of root tinned or nickel plated copper wire folded flat conductive core is extremely soft; 
 (2) special PTC functional core band; 
 (5) fluorine plastic insulation and the strengthening of the protection layer; 
 (4) tin-plated or nickel-plated copper wire, braided, shielded or armored sheath; 
 (6) functional layers: 100% shield to delay the insulation, far-infrared coating.